diff options
| author | Serhei Makarov <serhei@serhei.io> | 2024-01-18 16:50:33 -0500 |
|---|---|---|
| committer | Serhei Makarov <serhei@serhei.io> | 2024-01-18 16:50:33 -0500 |
| commit | ab97ae258f9aacf2b1daa94d67227f280fa3d472 (patch) | |
| tree | 974ac862681b922944a9bddee48356cc593ed0ef | |
| parent | b5da60c2deca1322ff49e4d874022648af45fbda (diff) | |
eu-stacktrace WIP fixes: introduce a frame limit
Rarely, the unwinder can loop indefinitely.
Guard against this, similarly to the code in stack.c.
| -rw-r--r-- | src/stacktrace.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/stacktrace.c b/src/stacktrace.c index 5cd80891..fdd9c25b 100644 --- a/src/stacktrace.c +++ b/src/stacktrace.c @@ -124,6 +124,8 @@ SYSPROF_ALIGNED_END(1); #endif // ifndef SYSPROF_CAPTURE_FRAME_STACK_USER #endif // ifdef HAVE_SYSPROF_4_HEADERS +static int maxframes = 256; + static char *input_path = NULL; static int input_fd = -1; static char *output_path = NULL; @@ -943,6 +945,8 @@ sysprof_unwind_frame_cb (Dwfl_Frame *state, void *arg) #endif struct sysprof_unwind_info *sui = (struct sysprof_unwind_info *)arg; + if (sui->n_addrs > maxframes) + return DWARF_CB_ABORT; if (sui->n_addrs >= sui->max_addrs) { sui->addrs = reallocarray (sui->addrs, sui->max_addrs + UNWIND_ADDR_INCREMENT, sizeof(Dwarf_Addr)); |